<https://www.qualityprecisiontools.com/product/m5-o10-mm-silicon-nitride-ball-tungsten-carbide-stem-l-65-5-mm-ml-52-5-mm-for-zeiss-applications/#itempage>
<http://schema.org/description>
"M5 Ø10 mm silicon nitride ball, tungsten carbide stem, L 65.5 mm, ML 52.5 mm, for Zeiss applications M5 straight stylus, for Zeiss applications. Note: measurement length is to end of ball. DK 10.0 mm ML1/ML 52.50 mm DG/D 11.00 mm L 65.50 mm DS1/DS 6.0 mm Weight 25.8 g"
<https://www.qualityprecisiontools.com/product/m5-o10-mm-silicon-nitride-ball-tungsten-carbide-stem-l-65-5-mm-ml-52-5-mm-for-zeiss-applications/>